content: /*
   * Copyright 2011-2016 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package ix;
  
  import java.util.*;
  
  final class IxCharacters extends Ix<Integer> {
  
      final CharSequence source;
  
      final int start;
  
      final int end;
  
      IxCharacters(CharSequence source, int start, int end) {
          this.source = source;
          this.start = start;
          this.end = end;
      }
  
      @Override
      public Iterator<Integer> iterator() {
          return new CharactersIterator(source, start, end);
      }
  
      static final class CharactersIterator implements Iterator<Integer> {
  
          final CharSequence source;
  
          final int end;
  
          int index;
  
          CharactersIterator(CharSequence source, int start, int end) {
              this.source = source;
              this.index = start;
              this.end = end;
          }
  
          @Override
          public boolean hasNext() {
              return index != end;
          }
  
          @Override
          public Integer next() {
              int i = index;
              if (i != end) {
                  index = i + 1;
                  return (int)source.charAt(i);
              }
              throw new NoSuchElementException();
          }
  
          @Override
          public void remove() {
              throw new UnsupportedOperationException();
          }
      }
  
  }
  